The great popeye spinach decimal point myth science made. Although the sailor man wasnt known for speaking clearly, his actions sure did. Jul 07, 2016 furthermore, sutton claims that popeye wasnt eating the spinach for its iron content anyway, but for its vitamin a content, or at least he was according to his creator, e. In the category of vegetables, we included whole vegetable products in the top 10 list. A study on the presence of anemia in wartime day nursery children was conducted. Since then, also numerous other scientists have measured the iron content of spinach, but the results of the modern studies have disproved the claims of the german chemists. Handbook of vegetable preservation and processing crc. In fact, youd need to eat the entire head of lettuce to gain just 2. Both raw and cooked tomato, and cooked cabbage and cauliflower exert an enhancing effect on an irondense food such as laver yang et al. Comparative study of spectroscopic techniques for the. The search on this page works by searching the content of each page individually, much like any web search. The % daily value dv tells you how much a nutrient in a serving of food contributes to a daily diet. The iron bioavailability and related constituents analysed in all the fresh greens listed in table 2 indicate that the moisture content of fresh greens ranged from 80.
As more data are accumulated it becomes increasingly evident. Both raw and cooked tomato, and cooked cabbage and cauliflower exert an enhancing effect on an iron dense food such as laver yang et al. Pdf concentration of iron was determined in vegetables of spinach, cabbage. The myth that the spinach contains exceptionally high amounts of iron was debunked by scientists a long time ago. Regularly eating spinach may even help lower your risk for health conditions such as heart disease, cancer and agerelated macular degeneration, according to. The iron content of the leafy vegetables varied from 11. Enhancing iron bioavailability of vegetables through proper. The preliminary analyses of spinach ferredoxin showed relatively high iron content 0. Nonheme iron is typically absorbed at a rate of 220%. Spinach has long been regarded as a real iron bomb but this isnt actually true, and the myth has been perpetuated for years all because of the accidental omission of a decimal point. Alice categories anemia, minerals, supplements tags dr. I would guess that cooked spinach has lost a lot of the water content, so cooking doesnt add more iron, it just increases the percentage or iron by reducing the total mass. The food with the highest iron content per typical serving is spinach, cooked, boiled, drained, with salt which contains 6. Practical handbook of nutrition in clinical practice crc.
Enhancing effect on staple foods and iron dense food through cooking with selected vegetables 21. Can humans digestive system absorb the iron present in spinach. Nevertheless, this green leafy vegetable has managed to maintain its reputation as an excellent source of iron, perhaps because it actually does contain surprisingly high amounts of iron compared with other vegetables. Iron contents vary from 25 to 56 mgkg in the different varieties of wheat and 723 mgkg in rice grains. It is a rich source of vitamin a, vitamin c, vitamin e, vitamin k, calcium, iodine, magnesium, and several vital antioxidants, number one source of iron among all other vegetables. Iron titration for broccoli and spinach potassium permanganate purple liquid pl first sample of solution we did four trials of the first purple solution. In table ii are given the moisture and iron content of the samples analyzed. Fruits and vegetables high in iron include dried fruits, dark leafy greens, podded peas, asparagus, button mushrooms, acorn squash, leeks, dried coconut, green beans, and raspberries. The iron content of spinach is actually onetenth of what was reported. Feb 11, 2014 the iron content of the beans that were cooked without soaking ranged from 2. In this graph, every data collected for experiment is included. Below is a figure that displays the content of iron in plantbased foods in data collected by the usda.
Spinach is an annual plant that grows best in cool, damp weather and rich, moist soil. The concentration of iron in potato solanum tuberosum, cabbage brassica. Finally, we discuss the role of fiber in fruits and vegetables in disease prevention. Like most vegetables, spinach is low in calories, fat free, and a good source of fiber. The idea that spinach is an iron rich food dates back to the late 1800s when german chemists first measured the iron content of spinach.
The fallacy that vitamin c helps us absorb more iron from spinach is. The results of the study are summarized in table 2, table 3, table 4, table 5, table 6. An overview of nutritional and nntinutritional factors in green leafy. Iron in 12 cup spinach nutrition facts for 12 cup spinach. Bay leaves and cumin seeds were found to contain exceptionally high quantities of iron, 34. The great popeye spinach decimal point myth science made simple. Spinach contains oxalate that blocks iron takeup by humans. However, if you are wondering about spinach, clam may not be on your menu. The practical handbook of nutrition in clinical practice is an excellent supplement to standard textbooks in nutrition support and a musthave reference for those with an interest in this area. For this purpose a concentrated water extract of dried spinach was used and the results of this work are presented in this paper. The best we can absorb is 20 percent of the iron in spinach. Oxalic acid naturally binds with minerals like calcium and iron, making them harder for the body to absorb.
And far more than youd encounter in a head of lettuce. What is the chemical composition of jim humbles miracle mineral solution, and why. The reaction between iron and xylenol orange was very quick. Spinach is a source of nonheme iron, which is found in vegetable sources.
Vitamin a is important for growth and development, so would help to keep popeye strong. The second edition of a bestseller, handbook of vegetable preservation and processing compiles the latest developments and advances in the science and technology of processing and preservation of vegetables and vegetable products. To put 100 grams in perspective, consider alternative measures for this food. However, spinach also contains oxalic acid which inhibits iron absorption. Get handbook of food science technology and engineering 4 volume set book by crc press pdf file for free from our online library. I determined the iron content of spinach in mg iron per. Red blood cells deliver oxygen to all the tissues of the body through the actions of an iron containing protein called hemoglobin. Spinach is related closely to beets and swiss chard and is a member of the goosefoot family because of the shape of its leaves. It includes coverage of topics not found in similar books, such as nu. Dec 21, 2018 spinach is a source of nonheme iron, which is found in vegetable sources. For decades, spinach was believed to contain ten times more iron than it really does. From the department of agricultural chemistry, university wisconsin, madison. Popeyes spinach story rich in irony if you simply believe whatever you read you will end up in a spot of bother.
Spinach provides significant amounts of micronutrients, including manganese, folate and vitamins a, c and k. Are there ways that i can process spinach in my home so that the iron is easier to digest, or other fruits or vegetables that i could eat at the same time as spinach in order to. Nutritional profil of vegetables and its significanc to human health. Are there ways that i can process spinach in my home so that the iron is easier to digest, or other fruits or vegetables that i could eat at the same time as spinach in order to make it easier to absorb its iron content. The current daily value %dv for iron is 18 milligrams mg.
I determined the iron content of spinach in mg iron per 100g of spinach and got the result of 4. Furthermore, sutton claims that popeye wasnt eating the spinach for its iron content anyway, but for its vitamin a content, or at least he was according to his creator, e. Iron absorption from cereals and legumes, many of which have high native iron content, is generally low because of their high contents of phytate and sometimes polyphenols. Great for use in a variety of dishes, spinach is a nutrient packed vegetable that can be incorporated into almost any meal. Spinach spinacia oleracea is natural herb ingredient of fortifi. Iron titration for broccoli and spinach by veronica.
Read online now handbook of food science technology and engineering 4 volume set book by crc press ebook pdf at our library. One part of the study was to cook three foods in three different types of pans aluminum, iron and enamel. Effects of cooking methods on the iron and zinc contents. The total fat content of 12 cup serving 12 cup spinach is 0. Diet is a great strategy to combat any iron deficiency. Enhancing iron bioavailability of vegetables through. Popeyes spinach story rich in irony dr karls great.
Nutritional comparison of fresh, frozen and canned fruits and. However, most of this iron is removed during the milling process. For that reason the usda has it that cooked spinach is a good source of iron. And when it comes to the facts about spinach, even dr karl was fooled. Unfortunately, spinach may also interfere with calcium absorption. Cooked broccoli and cauliflower, for example, have almost double the iron. Spinach ferredoxin is the most reducing constituent isolated thus far from the photosynthetic apparatus of green plants or photosynthetic bacteria 3. Average content for spinach the average or more correctly the arithmetic mean amount of iron contained in 100g of spinach, based on the list below of 10 different items under the general description of spinach, is 2. Spinach is a versatile leafy green with a relatively long growing season in colorado. In truth, spinach actually has about the same iron content as a lot of other vegetables, and even less than others.
The problem, however, is that the iron from plantbased foods. The chemical composition of baby spinach semantic scholar. Chem 0 lab 3 report chem 0 experiment 3 spectroscopic. Decades later, children are still hearing parents say, eat your spinach for its iron content so you can be big and strong like popeye. In order to make the proper dilutions for feeding the extract in quantities which would supply 0. The iron content of the beans that were cooked without soaking ranged from 2. Below is a list of fruits and vegetables high in iron, for more, see the extended list of iron rich. The actual iron content in spinach is not even usable by humans through digestion. The percentage of the recommended daily value for this serving is 46 %. Nonheme iron is not as bioavailable to the body as the heme iron found in animal products. The iron, the spinach, and popeye the sailor posted on september 25, 2017 december 11, 2017 author dr. Based on current knowledge, it would be more correct instead to convince the young to eat the greens based on its vitamin, protein and mineral content.
Spinach is an excellent source of vitamin a in the form of betacarotene. Full text of chemistry crc handbook of residue analytical. Nutritional and toxicological aspects of the chemical changes of food. Within the fat content, a 12 cup spinach contains 0. Generally, vegetables are widely designated as protective foods in human diet due to their varied health benefits attributable to the richness in.
What is the percentage chemical composition of spinach leaf. Spinach is easily absorbed by our body, improves pancreatic and. Iron content of food cooked in iron utensils was studied as early as 1945 by mackay et al. Effects of cooking methods on the iron and zinc contents in. Handbook of vegetable preservation and processing crc press. Nutritional comparison of fresh, frozen and canned fruits uc anr. On the other hand, when the previously soaked cowpeas were cooked in a pan, the iron content ranged from 2. I determined the iron content of spinach in mg iron per 100g.
Popeye was wise to attribute his great strength to eating spinach as the nutritional benefits include high levels of iron, zinc. Iron bioavailability in green leafy vegetables cooked in. Pdf determination of iron and moisture content in commonly. Raw spinach contains an inhibitor called oxalic acid or oxalate. Iron determination of spinach hi guys, i am back with more questions for iron determination. I do not think that every piece of spinach has the exact same amount of iron but i would assume that it would be pretty close.732 888 1259 260 1206 1381 591 609 257 154 1397 231 1110 947 156 1453 707 264 1057 257 743 126 823 1025 566 1530 1214 92 747 424 283 1448 744 1396 1472 312 170 616 468 108 746 224 563 767 354